A proposal for integrating pre-crash vehicle dynamics into occupant injury protection evaluation of small electric vehicles

• This research addresses integration of pre‐crash dynamics into crash phase using two differenthuman body models. The methodology discussed is a manual way of utilizing data from two differentsimulations and developing an interlinking chain of data to explore feasibility of integration.The crash pulse was based on a collision scenario of 35 km/h (MPDB – 35 km/h ‐ 30⁰ ‐ 50% offsetconfiguration and a generic 1g braking pulse for the pre‐crash phase was considered for AutonomousEmergency Braking events. Data transfer from the pre‐crash to in‐crash phase involved position, velocity, stressand strains for different body parts to introduce pre‐crash dynamic effects. Two parameters, chest compressionand contact force of Human Body Models with airbag, were chosen to assess risk of injures to head and thorax.Simulations with different crash initiation times (650ms, 830 ms and 970 ms) were used to assess response ofrestraint systems to changing inertial loads of occupants.The simulations results indicated that this method of data transfer is viable and can be used to assess injuryrisks for occupant. The coupling of two different simulations with different models could definitely yieldaccurate results, but, is sufficient to ensure realistic occupant kinematics and reasonable injury predictioncapabilities.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Farkostteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Vehicle Engineering (hsv//eng)

Nyckelord

human body model

active safety

electric vehicle

integrated safety

occupant safety

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